Correct option is D
Given: 54, 55, 58, 63, 70, ?
Logic: The series follows an increasing pattern of odd numbers +1, +3, +5, +7, +9
54 + 1 = 55
55 + 3 = 58
58 + 5 = 63
63 + 7 = 70
So, the next number is 70 + 9 = 79
58 + 5 = 63
63 + 7 = 70
So, the next number is 70 + 9 = 79
Thus, the correct option is (d) 79.